/usr/sbin/nss_pcache is in libapache2-mod-nss 1.0.14-1+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/sbin/../lib/libapache2-mod-nss/nss_pcache
/usr/sbin/../lib/libapache2-mod-nss/nss_pcache